Design Article
Apply low-cost, easy-to-use, low-noise crystal buffers
Georg Becke, Systems Engineer, Clock Distribution Circuits, Texas Instruments
9/8/2010 7:00 AM EDT
The choice of using discrete crystals only, or a “crystal and buffer” solution, depends on a number of factors including how many devices need to be clocked, what are the frequencies, the board layout and jitter requirements. For multi-media applications, a typical 27MHz clock is required for the application-processor, the video-chip, and the audio-device. Instead of using three single 27MHz crystal-oscillators, one crystal combined with a buffer device can do it, and saves money as well. But, can a single crystal-buffer solution keep up with the low-noise performance of a discrete crystal?
This article will explore these issues and is presented at a single pdf file (no registration required). To read it, click here.
About the Author
Georg Becke is a system engineer with the Clock Products group at Texas Instruments Incorporated. He is Senior Member of Technical Staff at Texas Instruments. He received his MSEE and BSEE in Electronics and Data Processing from University (FH) in Munich, Germany. Georg can be reached at ti_gbecke@list.ti.com.
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